Answer:
Emec = 94050 [J]
Explanation:
In order to solve this problem, we must understand that all thermal energy is converted into mechanical energy.
The thermal energy can be calculated by means of the following expression.
where:
Q = heat [J]
Cp = specific heat of water = 4186 [J/kg*°C]
m = mass = 300 [g] = 0.3 [kg]
T_final = 95 [°C]
T_initial = 20 [°C]
Now we can calculate the heat, replacing the given values:
![Q=0.3*4180*(95-20)\\Q= 94050[J]](https://tex.z-dn.net/?f=Q%3D0.3%2A4180%2A%2895-20%29%5C%5CQ%3D%2094050%5BJ%5D)
Since all this energy must come from the mechanical energy delivered by the exercise bike, and no energy is lost during the process, the mechanical energy must be equal to the thermal energy.
![Q=E_{mec}\\E_{mec}=94050[J]](https://tex.z-dn.net/?f=Q%3DE_%7Bmec%7D%5C%5CE_%7Bmec%7D%3D94050%5BJ%5D)
There are 90 degrees directly overhead. Barnard is at 74 degrees at Sam's position, 1300.0 kilometers south. The part of the 360 degree circle that corresponds to Hua's circumference is the difference between 90 and 74, or 16 degrees. 1300.0 km is therefore 16/360 of the circle, or 0.044 times the circumference. 29.250 km is the circumference (1300 divided by 0.044). Radius divided by two gives the circumference equation. Therefore, 2r=29250 and the radius of Hua=4655.3 km
<h3>
What do you mean by Astronomy?</h3>
Astronomy is a scientific science that examines celestial objects and phenomena (from the Ancient Greek "o" (astronoma), "science that investigates the laws of the stars"). In order to describe their creation and evolution, it makes use of mathematics, physics, and chemistry. Planets, moons, stars, nebulae, galaxies, and comets are among the interesting celestial bodies. Supernova explosions, gamma ray bursts, quasar, blazar, pulsar, and cosmic microwave background radiation are examples of relevant phenomena. Astronomy is the study of everything that comes from outside the atmosphere of the Earth. Astronomical cosmology is the study of the cosmos as a whole.
To know more about Astronomy visit:
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Velocity v=gxt=-9.81m/s^2 (2secs) = 19.62 m/s
The total mass of the carts in the collision is the<u> independent variable</u> and the final velocity is a <u>dependent variable.</u>
- A variable that does not depend on another variable for its value is called an independent variable.
- Like the change in mass of cart will impact the momentum of the car but the mass will not get impacted by the change in the momentum.
- The variable which is tested or measured by conducting an experiment is called the dependent variable.
- The dependent variable value depends upon the independent variable.
- Like final velocity of the cart will get impacted after the collision as the mass of carts after collision will get reduced.
- A variable which constant throughout the course of an experiment is called the control variable.
So, from this, we can conclude that the total mass of the carts in the collision is the<u> independent variable</u> and the final velocity is a <u>dependent variable.</u>
Learn more about different variables here:
brainly.com/question/17555102?referrer=searchResults
brainly.com/question/508634?referrer=searchResults
Answer:
The thickness of the film, t = 470.59 nm
Explanation:
For constructive interference, the net phase change, 
Then the thickness, 
m₁ = 1,2,3........
..............(i)
For destructive interference, the net phase change is 
m₂ = 1,2,3........
thickness, 
..............(ii)
Equating (i) and (ii)
.............(iii)
From (iii), When m₁ =2, m₂ = 2
The thickness , then becomes
t = 470.59 nm
